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Write an original summary of this book chapter.
Input: This chapter discusses an approach to online evaluation of natural language interaction systems based on procedures automatically generated from domain models. It focuses on the critical problems of automatically generating correct evaluation tests and providing meaningful scores for the evaluation of natural language understanding and dialogue management performance.
Output:
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This chapter explores a method for measuring the performance of natural language interaction systems, by creating automated procedures from domain models. It examines the challenges of generating accurate tests and producing scores to evaluate the system's understanding of language and management of dialogues.